Thanks for your reply Djedj. I have now had further 'experts' examine the Dolmans. The general consensus seems to be that they have both been used as theatrical costumes; the Brown Jacket was made around 1900, using original buttons, but the Light Blue jacket, is in fact pre 1830; the giveaway is the small size, the circular quilting to the inside front and the general quality of manufacture. So the Blue one would seem to be the real thing!